Device for car-doors.



NTE

sTAfrEs PArENT oFFioE.

WALTER E. I-IALEY, 0F ROANOKE, VIRGINIA.

DEVICE FOR CAR-DOQRS.

when an obstruction is encountered,within the car, such obstruction engaging the car door to press the same outwardly.

Specifically, it is the object of the invention to provide a series oit' novel,l rcsiliently supported, anti-friction elements, adapted to uphold the door,'and to move transversely of the door, under pressure against the inside of the door.

A further object of the invention is to provide 4novel means for holding the door in fixed relation with respect to the car.

1n the drawings,-I `igure 1 shows in s ide elevation, a car door equipped with the delvice constituting the subjectmatter of the present invention; Fig. 2 is a vertical longitudinal section on the line 2 2 of Fig. l; Fig. 3 is a detail enlarged from Fig. 2, and showing one of the door-controlling springs under compression; and Fig. 4 is a section on the line Pw/l of Fig. 1.

By way of explanation I will state that considerable diltiqulty has been encountered, heretofore, in opening a car door, for the reason that the doors, notably if engaged u )on their inner sides by the cargo, invariably jam and resist eli'ort to slide them. These undesirable features result, in no small measure, from the fact that car doors are ordinarily supported from their upper edges, upon relatively small pulleys, engaging a fixed track, the handle of the door being located adjacent the lower edge of the door. Under such circumstances, the pull, transversely of the door, lis exerted' against the lower edge of the door, whereas the door is supported adjacent its upper edge,the pull being therefore exerted'` a considerable distance from the point at which the door binds. Moreover, no means is ordinarily provided whereby the door, as an entity, may move laterally, to escape such portions of the load as may be engaging the inner surfaces of the doors. j

In the accompanying drawings, the numeral 1 denotes a portion of the side of a Specification of Letters Patent.

Application led September 11, 1911. Serial No. 648,726.

Patented July 2,1912.

ear, having a doorway 2, adapted to be closed by a vertically disposed,sliding door 3. Secured to the side 1 of the car, adjacent the lower edge of the-doorway 2, are a series of brackets 1, supporting a track 5. Secured in the door 3, are bearing pins 6, which outstand beyond the outer face of the door, the outer ends of the bearing pins 6 being preferably, although not. necessarily, engaged with a shield 7 retained upon` the door 3 by securing elements 8.

Mounted to rotate. 'upon the bearing pins G, and to slide upon so. l

the bearing pins, longitudinally of the same,

are pulleys 9. These pulleys 9 which are located adjacent the lower edge of the door way 2, are of relatively large diameter, compared with the pulleys (hereinafter described) and located at the upper edge of 'the tloor-n'fay. The pulleys 9 are deeply grooved, to engage with the track 5.

lVashe'rs 10 surround the bearing pins 6, adjacent the door 3these washers 10 being, if desired, countersunk into the door, as clearly shown in Figs. 2 and Other washers 11 are slidableupon Athe bearing pins these washers 11 being 'located adjacent the pulleys l). Surrounding the bearing pins G, and located between the washers 10-'and 11, are compression springs 12. At- 1- tention isi especially directed to the fact, at this point, that under normal circumstances, the springs 12 exert no pressure against the door 3, tending to thrust the door 3 inwardly, against the wall of the car.

Brackets 14 are secured to the door 8, adv jacent the upper edge thereof, and from the brackets 111, bearing pins 15 entstand, the bearing pins being housed beneath the shields 1G, secured to the side wall 1 of the car, above the door-way 2. Pulleys 17 are mounted upon the bearing pinsf152 both for rotation upon the pins, and for sliding movement upon the pins, longitudinally of the same. These pulleys are grooved, to receive the track 18, carried by brackets 19, se. cured to the side wall of the car, above the` door-way 2. The bearing pins-15 are surrounded by slidable washers 20. adaptedto bear against the pulleys 17. Compression springs 21 are interposed between the upper ends of the brackets 14 and the washers 20. Again, it is to be noted that under normal conditions, ,the springs 21 excl-tfno thrust against the door 3, tending to thrust the door against the side wall of the car.

The door 3 may be secured, adjacent one l b; in the; fact that the springs 12 and exert n@ pressure against the door 3, un 5er: :uornm mmditions *he springs will in.-

e in R0 wise, Wh the fre@ Sliding have libe 7.53m@ the dom f5 o L 91'@ free.

Mmsox, 

